Remove interface_impl.h and error_handler.h usage from chromium

mojo/common/weak_binding_set.h

Index: mojo/common/weak_binding_set.h
diff --git a/mojo/common/weak_binding_set.h b/mojo/common/weak_binding_set.h
index 66a90b1da135d4cd1f408f6755fc519c374a4810..a94e8f4adb05570607647543a39ab10344ccb334 100644
--- a/mojo/common/weak_binding_set.h
+++ b/mojo/common/weak_binding_set.h
@@ -28,17 +28,6 @@ class WeakBindingSet {
     error_handler_ = error_handler;
   }
 
-  // NOTE: Deprecated. Please use the method above.
-  // TODO(yzshen): Remove this method once all callsites are converted.
-  void set_error_handler(ErrorHandler* error_handler) {
-    if (error_handler) {
-      set_connection_error_handler(
-          [error_handler]() { error_handler->OnConnectionError(); });
-    } else {
-      set_connection_error_handler(Closure());
-    }
-  }
-
   void AddBinding(Interface* impl, InterfaceRequest<Interface> request) {
     auto binding = new WeakBinding<Interface>(impl, request.Pass());
     binding->set_connection_error_handler([this]() { OnConnectionError(); });